LEGAL PROCEEDINGS, ENVIRONMENTAL MATTERS, AND OTHER EVENTS (Details 2) (National Master Freight Agreement)	3 Months Ended
Mar. 31, 2013
Minimum
Legal Proceedings
Period within which decision of legal matter is expected	60 days
Maximum
Legal Proceedings
Period within which decision of legal matter is expected	90 days

Represents the period within which a decision on a specified legal matter is expected.

No definition available.

Name:	abfs_LegalProceedingsPeriodWithinWhichDecisionIsExpected
Namespace Prefix:	abfs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration